The Green Marathon is THE new benchmark for sustainability in tire development and the most environmentally friendly bicycle tyre that Schwalbe has developed to date. Not only is it particularly durable, it is also made entirely from fair trade natural rubber and consists of a total of 70% recycled and renewable materials. It is 98% free of harmful substances. The Marathon is the first and only bicycle tyre in the world to close the cycle: Its rubber compound uses 100% carbon black from recycled bicycle tyres. Its variety of sizes makes it suitable for every bike.